ADS
783
ADS7834
4
SBAS098A – JANUARY 1998 – REVISED SEPTEMBER 2003
12-Bit High-Speed, Low-Power Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q
500kHz THROUGHPUT RATE
q
2.5V INTERNAL REFERENCE
q
LOW POWER: 11mW
q
SINGLE-SUPPLY +5V OPERATION
q
DIFFERENTIAL INPUT
q
SERIAL INTERFACE
q
12-BITS NO MISSING CODES
q
MINI-DIP-8 AND MSOP-8
q
0V TO V
REF
INPUT RANGE
DESCRIPTION
The ADS7834 is a 12-bit sampling analog-to-digital converter
(A/D) complete with sample/hold, internal 2.5V reference,
and synchronous serial interface. Typical power dissipation
is 11mW at a 500kHz throughput rate. The device can be
placed into a power-down mode that reduces dissipation to
just 2.5mW. The input range is zero to the reference voltage,
and the internal reference can be overdriven by an external
voltage.
Low power, small size, and high speed make the ADS7834
ideal for battery-operated systems such as wireless
communication devices, portable multi-channel data loggers,
and spectrum analyzers. The serial interface also provides
low-cost isolation for remote data acquisition. The ADS7834
is available in a plastic mini-DIP-8 or an MSOP-8 package
and is ensured over the –40°C to +85°C temperature range.
APPLICATIONS
q
q
q
q
BATTERY-OPERATED SYSTEMS
DIGITAL SIGNAL PROCESSING
HIGH-SPEED DATA ACQUISITION
WIRELESS COMMUNICATION SYSTEMS
CLK
SAR
CONV
+In
CDAC
–In
S/H Amp
Comparator
Serial
Interface
DATA
Buffer
Internal
+2.5V Ref
V
REF
10kΩ
±30%
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
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testing of all parameters.
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